It took Amazon seven years to turn a profit, so the unexpected foray of its Korean look-alike, Coupang, into the black just 18 months after it became a public company came as a pleasant surprise to investors: the company’s stock price immediately rose by more than 10 per cent. On 18 November, it still languished about 60 per cent below its closing price on its first day of trading, the quarterly profit is a major milestone, particularly as Coupang first began operations as a marketplace as lon